A U.S. Air Force C-130 Hercules assigned to the 757th Airlift Squadron, Youngstown, Ohio, awaits main engine start-up, at Joint Base Langley-Eustis, Va., Aug. 1, 2017. The 757th AS is the only unit, which carries out an aerial spraying mission in the Department of Defense, covering all stateside bases for Joint Service readiness. (U.S. Air Force photo/Staff Sgt. Carlin Leslie)